Question

我正在开展一个项目，其中有许多UIViewController和所有都处于纵向模式。但是，想要激活特定UIViewController的旋转。我之前搜索过这个并找到了很多答案，但所有这些都不适合我。我的应用程序也支持iOS6和iOS7。

此外，我已尝试使用此链接上提到的自定义NavigationController How to allow only single UIViewController to rotate in both Landscape and Portrait direction?

请帮助我。谢谢。

Answer 1

如果你的app只允许项目plist中的Device Orientation Portrait，这可能适合你。

表示您要旋转的特定viewcontroller.m

添加此方法：

- (BOOL)canAutoRotate
{
    return YES;
}

然后在AppDelegate.m

内

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    UIViewController *currentViewController = [self topViewController];

    if ([currentViewController respondsToSelector:@selector(canAutorotate)]) {
        NSMethodSignature *signature = [currentViewController methodSignatureForSelector:@selector(canAutorotate)];

        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];

        [invocation setSelector:@selector(canAutorotate)];
        [invocation setTarget:currentViewController];

        [invocation invoke];

        BOOL canAutorotate = NO;
        [invocation getReturnValue:&canAutorotate];

        if (canAutorotate) {
            return UIInterfaceOrientationMaskAll;
        }
    }

    return UIInterfaceOrientationMaskPortrait;
}

- (UIViewController *)topViewController
{
    return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

- (UIViewController *)topViewControllerWithRootViewController:(UIViewController *)rootViewController
{
    if ([rootViewController isKindOfClass:[UITabBarController class]]) {
        UITabBarController* tabBarController = (UITabBarController*)rootViewController;
        return [self topViewControllerWithRootViewController:tabBarController.selectedViewController];
    } else if ([rootViewController isKindOfClass:[UINavigationController class]]) {
        UINavigationController* navigationController = (UINavigationController*)rootViewController;
        return [self topViewControllerWithRootViewController:navigationController.visibleViewController];
    } else if (rootViewController.presentedViewController) {
        UIViewController* presentedViewController = rootViewController.presentedViewController;
        return [self topViewControllerWithRootViewController:presentedViewController];
    } else {
        return rootViewController;
    }
}

Answer 2

首先确保您已启用项目部署信息中的所有方向。

将以下代码添加到AppDelegate，

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{

    // Get topmost/visible view controller
    UIViewController *currentViewController = [self topViewController];

    if([currentViewController isKindOfClass:[ViewControllerThatWantsOrientation class]])
        return UIInterfaceOrientationMaskAllButUpsideDown;

    // Only allow portrait (standard behaviour)
    return UIInterfaceOrientationMaskPortrait;
}

- (UIViewController*)topViewController
{
    return [self topViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

- (UIViewController*)topViewControllerWithRootViewController:(UIViewController*)rootViewController {

    if ([rootViewController isKindOfClass:[UINavigationController class]])
    {
        UINavigationController* nav = (UINavigationController*)rootViewController;
        return [self topViewControllerWithRootViewController:nav.visibleViewController];
    }
    else if (rootViewController.presentedViewController)
    {
        UIViewController* presentedViewController = rootViewController.presentedViewController;
        return [self topViewControllerWithRootViewController:presentedViewController];
    }
    else
    {
        return rootViewController;
    }
}

在AppDelegate中添加上述代码后，从NavigationController类别和viewcontrollers中删除诸如shouldAutorotate，supportedInterfaceOrientations之类的方法（如果有的话）。

我希望这可以帮助你。

Answer 3

在您的应用中delegate .h添加以下代码行：

@interface PlayWithWSWithLibAppDelegate : NSObject <UIApplicationDelegate, UITabBarControllerDelegate> {

       BOOL flagOrientationAll;
}

@property (assign) BOOL flagOrientationAll;

在您的app delegate .m文件中添加以下方法

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window{
    //NSLog(@"PlayWithWSWithLibAppDelegate -- supportedInterfaceOrientationsForWindow");
    if([UICommonUtils isiPad]){
        return UIInterfaceOrientationMaskAll;
    }else if(flagOrientationAll == YES){
        return UIInterfaceOrientationMaskAll;
    } else {
        return UIInterfaceOrientationMaskPortrait;
    }
}

在视图中实现以下方式，您希望在iPhone设备中以纵向和横向旋转

-(void)viewWillAppear:(BOOL)animated
{
    self.tabBarController.delegate = self;

    PlayWithWSWithLibAppDelegate *delegate = (PlayWithWSWithLibAppDelegate *) [[UIApplication sharedApplication] delegate];
    delegate.flagOrientationAll = YES;
 }
}

-(void)viewWillDisappear:(BOOL)animated
{
    //NSLog(@"viewWillDisappear -- Start");
     PlayWithWSWithLibAppDelegate *delegate = (PlayWithWSWithLibAppDelegate *)[[UIApplication sharedApplication] delegate];
        delegate.flagOrientationAll = NO;
}

检查我的帖子：iOS 7 Interface Orientation

如何在许多UIViewContrller中允许特定UIViewController的方向（横向和纵向）？

3 个答案: